Lennard Zinn went in search of the most aerodynamic combination of rim and tubeless tire. Here's what he found.

Running tubeless tires without sealant, and examining the precision of the ETRTO standard for measuring tire and rim widths.

More discussion about measuring chain wear, and the correct way to align chainrings.

Take the guesswork out of chain stretch, and be scientific about drivetrain wear.

Lennard Zinn conducted durability tests on the 13 most popular 11-speed chains. Zinn found the strongest (and the weakest) chains, and produced a cost-analysis chart for grading them.

In this week's column, Lennard looks at firmware updates for electronic shifting, mixing mountain and road components, and using tire liners for additional tube protection.

In this week's column, Lennard explains how the position of your rear derailleur can impact chain friction.

In this week's Technical FAQ, a reader wonders why his Specialized S-Works Turbo 2Bliss blew off his Hunt Aero 30 wheels during a ride. Lennard believes the answer lies in the reader's crochet-type rims.

In this week's column, Lennard addresses a reader who made his own calculations for how to measure the friction losses in a bicycle's drivetrain.

In this week's column, a reader wants to know whether there is any data on the life expectancy of carbon-fiber racing rims.